10 (and More) Seeds Rapunzel, Campanula Rapunculus #714. Trailing Campanula found in: Campanula poscharskyana 'Blue Waterfall', A new twist on a much-loved garden favourite, 'Buzz'® is the world's first.. Other names. Campanula Carpatica is not only ideal for edging, but it also works nicely in a container planting on your sunny patio. There are many choices of trailing plants to choose from, both as annuals and perennials. across (2 cm). Also, the plants can tolerate colder climate under the best care. Plants for Small Gardens has a good selection of hardy, easy to grow plants for front and back gardens, courtyards, patios, pots and containers with a range of specially chosen collections for non-gardeners. Covering a large genus of annuals, biennials and perennials. Hot this week in Campanula Seeds. Genus. Most varieties have large star-shaped or bell-shaped flowers, in shades of blue, white and pink. Trailing Perennial Plants found in: Begonia x tuberhybrida 'Apricot Shades Improved' F1 Hybrid, Verbena 'Union Jack Mixed' Garden Ready, Clematis x.. Campanula poscharskyana. Genus Campanula may be annuals, herbaceous or evergreen perennials, with bell or star-shaped, often blue, flowers in late spring or summer Details C. poscharskyana is a spreading perennial forming a low mound of rounded leaves, with spreading stems bearing star-shaped light violet-blue flowers in summer and early autumn Blooming freely from late spring to early summer, masses of flowers are borne on spreading stems above a foliage of rounded, mid-green leaves. An incredibly eye-catching Bellflower, Campanula 'Birch Hybrid' is a vigorous, low-growing, evergreen perennial with masses of erect, violet-blue, bell-shaped flowers from early summer to early fall. A group of traditional, old-fashioned, cottage garden plants. Plants bear masses of small, star-shaped, blue flowers from summer to early autumn. Bellflower (Campanula Carpatica Blue) - Grown from Bellflower seeds, this perennial has a mat-forming characteristic that makes it an ideal ground cover for edging the flower border.The deep green foliage makes a lovely backdrop for these gorgeous sky blue flowers. Campanula Carpatica is not only ideal for edging, but it also works nicely in a container planting on your sunny patio. CAMPANULA POSCHARSKYANA SEEDS (Serbian Bellflower) - Plant World Seeds. This astonishingly tough rockery plant bears in spring and summer sprays of violet starry flowers. The conditions needed to raise these spectacular flowers are simple. Trailing plants also do a wonderful job of covering up unsightly patches of bare earth. Bellflower (Campanula Carpatica Blue) - Grown from Bellflower seeds, this perennial has a mat-forming characteristic that makes it an ideal ground cover for edging the flower border.The deep green foliage makes a lovely backdrop for these gorgeous sky blue flowers.